I was just reading some threads of people going back and forth between HD-DVD vs Blu-ray technologies and which was better, and which is going to survive, and all that jazz.  It's a template argument where item X and item Y can be replaced with a bunch of different things.  They never get anywhere, so here's a list of the most common ones I can think of.

1. HD-DVD vs Blu-ray
2. Microsoft Xbox vs Sony Playstation
3. ATI vs Nvidia
4. Intel vs AMD
5. Pepsi vs Coke
6. McDonald's vs Burger King
7. Ford vs Chevy
8. East Coast vs West Coast
9. Microsoft Windows vs MacOS
10. Ashley vs Mary Kate